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Questions and Answers
What is the main difference between contact and non-contact forces?
What is the main difference between contact and non-contact forces?
- Contact forces operate in one direction, while non-contact forces operate in multiple directions.
- Contact forces only affect stationary objects, while non-contact forces affect moving objects.
- Contact forces are stronger, while non-contact forces are weaker.
- Contact forces involve direct touch, while non-contact forces push or pull without touching. (correct)
Which of the following is an example of a non-contact force?
Which of the following is an example of a non-contact force?
- Frictional force
- Air resistance force
- Tension force
- Gravity (correct)
What kind of force fills a parachute with air to make it land more slowly?
What kind of force fills a parachute with air to make it land more slowly?
- Tension force
- Gravity
- Air resistance force (correct)
- Frictional force
If an object moves across a surface, which force is responsible for the effort needed to move it?
If an object moves across a surface, which force is responsible for the effort needed to move it?
What does tension force involve when an object like a string, rope, wire, or cable is stretched?
What does tension force involve when an object like a string, rope, wire, or cable is stretched?
Which force attracts objects 'downward' to the ground and is experienced by everything on Earth?
Which force attracts objects 'downward' to the ground and is experienced by everything on Earth?
Rollers are attached to the object that they are moving.
Rollers are attached to the object that they are moving.
Rollers and wheels are the same because they both have an axle that holds them in place.
Rollers and wheels are the same because they both have an axle that holds them in place.
Rollers reduce resistance caused by friction, making it easier to move objects.
Rollers reduce resistance caused by friction, making it easier to move objects.
Ancient Egyptians used rollers to build the Great Pyramids faster than expected due to the machinery available during that time.
Ancient Egyptians used rollers to build the Great Pyramids faster than expected due to the machinery available during that time.
Rollers are still used today in some warehouses, stores, and bottle depots.
Rollers are still used today in some warehouses, stores, and bottle depots.
A rolling pin is an example of a roller used to help in baking.
A rolling pin is an example of a roller used to help in baking.
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